OESOPHAGUS STOMACH
ECHINODERMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Tail composed of muscle blocks
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Pedicellaria
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Notochord
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Dorsal nerve cord
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Detailed explanation-1: -Thus, ‘Solid tubular ventral nerve cord’ is not a characteristic of phylum Chordata.
Detailed explanation-2: -Echinodermata is the phylum that includes invertebrate marine animals. They do not possess the five key features that characterizes the chordates: a notochord, a dorsal hollow nerve cord, pharyngeal slits, a post-anal tail and endostyle. Hence, option (b). Echinodermata is the correct answer.
Detailed explanation-3: -The presence of a notochord. A dorsal hollow nerve cord. Pharyngeal gill slits that are paired. Ventral heart. Post-anal Tail.
Detailed explanation-4: -They are cylindrical, triploblastic, coelomate, or pseudocoelomate animals. Respiration in these animals takes place through gills, trachea or body surface. Most of the times, sexes cannot be distinguished among the members. Modes of reproduction involve sexual and asexual. More items